Dinosaurs · Prosauropod

Yimenosaurus

Say it yee-muhn-oh-sore-us. The name means ‘Yimen lizard’.

Yimenosaurus beside a person 1.75 m tall. Ticks mark every metre.Body shape drawn for this site, showing the general build of prosauropods

Length: 9 m
Diet: Plant-eater
When: Early Jurassic195 to 190 million years ago
Fossils found in: China
Named by: Bai, Yang and Wang (1990)
Family tree: Dinosauria › Saurischia › Sauropodomorpha › Prosauropoda

Where Yimenosaurus sits in the age of dinosaurs.Periods from the ICS chart; dinosaur dates from the Natural History Museum

Prosauropods. Early long-necked plant-eaters, relatives of the sauropods. See all 16

Lived at the same time

Other prosauropods

Ammosaurus Early Jurassic
Aardonyx Early Jurassic
Anchisaurus Early Jurassic
Lufengosaurus Early Jurassic
Jingshanosaurus Early Jurassic
Yunnanosaurus Early Jurassic
Massospondylus Early Jurassic
Plateosaurus Late Triassic

Source: Yimenosaurus in the Natural History Museum Dino Directory, read 12 November 2026. Sizes are the museum's estimates for a typical adult. "Lived at the same time" lists dinosaurs whose dates overlap, which does not always mean they met.